Two-step-method chemically strengthened alkali aluminosilicate glass composition and preparation method thereof

A technology of glass composition and alkali-aluminosilicate, applied in the field of glass materials, can solve the problems of insufficient Li ion and Na ion exchange capacity, difficulty in quickly obtaining high DOL value strengthened glass, etc., and achieve the effect of improving surface hardness

Active Publication Date: 2018-09-28
KORNERSTONE MATERIALS TECH
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Problems solved by technology

If Li in the glass 2 O content is too low, Li ion and Na ion exchange capacity is insufficient, and contains NaNO 3 Once the Li ions in the mo

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  • Two-step-method chemically strengthened alkali aluminosilicate glass composition and preparation method thereof

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Embodiment Construction

[0035] In order to further disclose rather than limit the present invention, the present invention will be further described in detail below in conjunction with examples.

[0036] Table 1 is some examples of the present invention, according to the molar percentage of each oxide in table 1, weigh glass raw material, raw material weighs and puts into plastic bottle and mixes, to obtain uniform compound; Transfer to an 800ml platinum crucible, place the platinum crucible in a silicon-molybdenum rod high-temperature furnace, gradually raise the temperature to 1650°C, keep it warm for 4-6 hours, accelerate the discharge of glass bubbles and homogenize and eliminate the glass by stirring. After melting, pour the molten liquid into a heat-resistant stainless steel mold for molding, then take out the glass block and move it into a box-type annealing furnace for heat treatment at 600°C for 2 hours, and then lower it to 550°C at a rate of less than 1°C / min. Then naturally cool to room t...

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Abstract

The invention belongs to the technical field of glass materials, and particularly relates to a two-step-method chemically strengthened alkali aluminosilicate glass composition and a preparation methodthereof. The two-step-method chemically strengthened alkali aluminosilicate glass composition comprises the following components in percentages by mole: 53-65% of SiO2, 16-22% of Al2O3, 0.01-0.5% ofB2O3, 4-8% of Li2O, 8-14% of Na2O, 0.01-1% of K2O, 0.01-3% of MgO, 0-1% of ZnO, 0-4% of P2O5 and 0-0.1% of SnO2. The formula of glass is optimized and lithium and phosphorus are added in the glass toobtain the composition, the composition is chemically strengthened by a two-step method, thus, glass has high surface pressure stress and a deep ion exchange layer, and the surface hardness, scratch resistance and falling resistance of the glass are improved.

Description

technical field [0001] The invention belongs to the technical field of glass materials, and in particular relates to a two-step chemically strengthened alkali-aluminosilicate glass composition and a preparation method thereof. Background technique [0002] With the development and demand of the touch screen and display market, the rapid development and demand of touch screen and display cover glass have been driven. With people's pursuit of the appearance and performance of mobile terminal devices such as smart phones, the cover glass is gradually transitioning from the traditional 2D shape to 2.5D and 3D shapes. This also puts forward more stringent requirements on the performance of the cover glass used to protect the screen. However, the strength of ordinary silicate glass still cannot meet the needs of daily use, such as repeated drops of mobile phones and collisions with sharp objects, etc., will cause damage to the screen. The cover glass is required to have high fra...

Claims

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Application Information

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IPC IPC(8): C03C3/097C03C21/00
CPCC03C3/097C03C21/002
Inventor 梁新辉陈招娣杨成钢洪立昕
Owner KORNERSTONE MATERIALS TECH
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